Apparatus for forming hollow pulp articles.



PATENTED AUG. 23, 1904.

J. H. RIVERS. 'APPARATUS FOR FORMING HOLLOW'PULP ARTICLES.

' APPLICATION FILED FEB. 6. 1904.

N0 MODEL.

2 SHBETS-SHEET l.

PATENTED' AUG. 23 1904.

,A 4 J. H. RIVERS. y g APPARATUS FORFORMING HOLLOW PULPVARTIGLESA' APPLICATION FILED T1716, 1904.

' a sums-sun 2.

no 11011111..v

llllllll l tl'l- V UNITED I STATES Patented August 23, 1904.

PATENT OFFICE.)

JULIAN H. RIVERS, OF ST. LOUIS, MISSOURL'ASSIGNOR TO UNITED STATES FIBER STOPPER COMPANY, OF S; LOUIS, MISSOURI, A

CORPORATION OF SOUTH DAKOTA.

- APPAR TUS FOR, FORMING HOLLOW PULP ARTICLES. I

SPECIFICATION formingpart of Letters Patent No. 768,309, dated. August 23, 1904:

. Application filed February a, 1904. Serial No. 192,375. (No model.)

To all whom it may concern/.-

Be it known that I, JULIAN H. RIVERS, a citi-' zen of the United States, residing at the city of St. Louis, State of Missouri, have invented a certain new and useful Improvement in Apparatus for Forming Hollow PulpArticles, of which the following is a full, clear, and exact. description, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had 1 to the accompanying drawings, forming part of this specification, in 'which Figural is a side elevational view, partly in section, of my improved apparatus. Fig. 2 is a vertical sectional view. Fig. 3 is a top.

. plan view, partly broken away. Fig. 4'is a I ing into-the construction of the article, said detail view of a formed hollow 'articlein its mold, and Fig. 5 is a detail view of an article formed by my improved apparatus.

This invention relates to a new and useful improvement in apparatus for forming hollow pulp articles, such as buckets, or other articles where itis desired to have a bottom wall or flange integral with the side walls.

Theobjects of this inventionare to utilize thev action of centrifugal force as a factor in determining the position of the fibers enterforce so disposing and compacting the fibers that a solid compact article composed of layers or strataof interwoven fibers is produceda Another object is to simplify the mechanism and so dispose and arrange the parts'that a number of articles can be produced simul- I taneously, all of said articles possessing similar properties and characteristics;

I do not in this applicatio im the process or the article, the same fdi ing the sub- 4 bered192,376 and 192,377. 'In the drawings, l-is', a driven shaft having pulleys 2 and 3 of different diametersmounted jects-matter of companion applications filed by me of even date herewithand serially numthereon, the larger ofwhich, 2, is belted to a pulley 4 0m shaft 5, mounted in a bracket 6,

,while the smaller, 3, is belted to a pulley 7 on a shaft 8', mounted in astati'onary bracket 9. I -Bracket 6-carries a funnel 10, into which the l6 isa spider-frame on the upper end of shaft 8, whichv frame carries bearings in horizontal alinement with the disk 11. In these bearings are. mounted molds 17, the bottoms and side walls of which are perforated, the open side of the mold (in the form of an openended cylinder orfrustum) being presented toward the feeding device. The mold is car-.

r ied by a shaft mounted in a bearing in the spider-frame, and on the opposite (outer) end .of this shaft is arranged a roller 18, which rides upon a trackring 19, carried by the easing 13. l

To insure roller 18 engaging the track-ring and causing its carried mold to rotate during the operation of the device, I arrange a com panion roller: 20 in the spider-frame for each roller 18 and provide an upper track-ring 21 for engaging-the rollers 20, said upper trackring being also supported by the casing 13.

In operation removable pieces of gauze 22 are preferably introduced in the mold to pre-' serve asmooth outer surface on-the finished article and to enable it tobe easily removed from the mold. Pulp-water beingdelivered upon the rotating disk 11 will be thrown outwardly by centrifugal force in the form of. a spray. The

frame 16 causes the molds to travel around the feeding device, during which the rollers 18 impart rotation to said molds, so as to bring the entire inner surface of the mold in the path of the spray. Upon striking the face of-the mold-the fibers of the pulp are caught and the water by centrifugal action is forced out. .Thefibers are separately'deposited and are capable of'being influenced so far as their position in the mold is concerned by the forces acting upon them. First, they are forcibly projected by the feeding device and lie in various directions in transit; second, upon striking the side wall of the mold centrifugal action due to the rotation of the frame 16 tends to straighten the fibers and cause them to lie in adirection from the open to the closed end of the mold, and, third, the rotation of the mold occasioned by roller 18 sets up a force acting at an angle to the second force above mentioned, and the influence of this third force is to cause the fibers to lie in a circumferential direction. The resultant position of the fibers is determined by the combined value of these forces, which value can be changed or modified to suit conditions or effectsdesired by changing the relative speeds, first, of the disk 11', second, of the frame 16, third, of the mold 17. With relation to the action of the above-mentioned forces on the fibers deposited upon the bottom of the mold thefirst (projectile) force tends to lay the fibers flat irrespective of direction, the second force is compactive, and the third causes the fibers to lie in spiral lines. All of these forces act simultaneously, and in some positions assumed by the fibers the third force is neutralized; but many fibers are so received as to be influenced thereby, as the finished article shows the fibers chiefly spirally disposed in the bottom wall and chiefly helically disposed in the side walls.

If desired to, line the interior surface of the article, I may spray liquid self-hardening cement upon the fibers after the article is finished, the forces herein referredto causing such substance to penetrate into the walls of the article, or the liquid cement may be added with the fibers, in which event the facing will be blended, thefibrous walls being relatively soft on the exterior and gradually hardening to the cementitiousfacing.

I am aware that minor changes in the construction, arrangement, and combination of the several parts of my device can be made and substituted for those herein shown and described without in the least departing from the nature and principle of my invention.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In an apparatus of the character described, the combination of means for feeding the pulp-water in the form of a spray, and a traveling rotatable mold; substantially as described. p

2. In an apparatus of the character described, the combination of centrally-located means for feeding the pulp-water, and a rotating mold revolving around said feedingpoint; substantially as described.

3. In an apparatus of the character described, the combination of a centrifugal pulpwater-feeding device, and a traveling rotatable mold; substantially as described.

4. In an apparatus of the character described, the combination of acentrifugal pulpwater-feeding device, and a series of rotating molds traveling around said feeding device; substantially as described.

5. In an apparatus of the character described, the combination of means for projecting the pulp-water in the form of a spray, and a mold having an open side presented toward the spray; substantially as described.

6. In an apparatus of the character described, the combination of means for projecting the pulp-water in the form of a spray, a mold having an open side through which the pulp-water is projected in the mold, and means for rotating said mold; substantially as described.

7. Inan apparatus of the character described, the combination of means for projecting the pulp-water in the form of a spray, a mold having an open side through which the pulp-water is projected in the mold, means for rotating said mold, and means for causing the travelof said mold; substantially as described.

8. In an apparatus-of the character described, the combination of acentraily-located spraying device, a rotating frame, a trackring, rollers on the frame riding upon said track-ring, and molds carried by the frame and rotatable with'said rollers; substantially as described.

9. In an apparatus of the character described, the combination of a centrally-located spraying device, a rotatable frame, an upper and a lower track-ring, rollers mounted in pairs in the frame and engaging said trackrings respectively, and molds carried by the track-ring and rotatable with said rollers; substantially as described.

10. In an apparatus of the character described, the combination of a shell having a conduit at its bottom tocarry ofi' waste, of an axially-arranged centrifugal feeding device, an axially-arranged spider-frame, means for rotating the feeding device and frame, a series of molds having perforated side walls and bottoms rotatable in said frame, and means for rotating said molds; substantially as described.

In testimony whereof I h'ereunto afiix my signature, in the presence of two witnesses, this 6th day of J annary, 1904.

JULIAN H. RIVERS.

ITO 

